package com.nebula.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.nebula.constant.JwtClaimsConstant;
import com.nebula.constant.MessageConstant;
import com.nebula.dto.UserLoginDTO;
import com.nebula.entity.User;
import com.nebula.exception.LoginFailedException;
import com.nebula.mapper.UserMapper;
import com.nebula.properties.JwtProperties;
import com.nebula.properties.WeChatProperties;
import com.nebula.service.UserService;
import com.nebula.utils.HttpClientUtil;
import com.nebula.utils.JwtUtil;
import com.nebula.vo.UserLoginVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {
    //微信服务登录接口地址
    public static final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private JwtProperties jwtProperties;

    @Autowired
    private UserMapper userMapper;

    @Override
    public UserLoginVO wxLogin(UserLoginDTO userLoginDTO) {
        String openid = getOpenid(userLoginDTO.getCode());

        if (openid == null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        User user = userMapper.getByOpenid(openid);

        if (user == null) {
            user = User.builder().openid(openid).createTime(LocalDateTime.now()).build();
            userMapper.insert(user);
        }

        Long userId = user.getId();
        Map<String, Object> claims = new HashMap<>();
        claims.put(JwtClaimsConstant.USER_ID, userId);
        String token = JwtUtil.createJWT(jwtProperties.getUserSecretKey(), jwtProperties.getUserTtl(), claims);
        UserLoginVO userLoginVO = UserLoginVO.builder().id(userId).openid(openid).token(token).build();
        return userLoginVO;
    }

    private String getOpenid(String code){
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN_URL, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
